# SDR AALA202102239016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 2021
- Submitted: February 24, 2021
- Operation: Air carrier
- Aircraft: [N991AU](https://openairdocs.org/aircraft/N991AU), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7131
- Aircraft time: 13,192 hours, 5,011 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Dirty
- Location: Cabin Air
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202102239016

## Discrepancy

AIRCRAFT WAS GROUNDED: CREW REPORT DIRTY MUSTY OIL SMELL DURING TAKE OFF, APPROACH, LANDING, TAXI, AND ENGINE SHUTDOWN.  REPLACED APU COOLING FAN (AALA202102239006) PER AMM 49-52-51 AND REPLACED 2 AIR CONDITIONING RECIRCULATION FILTER CARTRIDGES (AALA202102239016) PER AMM 21-21-41.

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